FEW SIRES HAVE MAGIC FORCE 11 



tions of horses as one hundred and fifty 

 years will give in generations of men. 

 I have bred horses for the knowledge it 

 would give me of human heredity, for I 

 knew such knowledge would eventually be 

 forthcoming and could be used for the up- 

 building of the human race. This has been 

 the dream of my life. My purpose in this 

 volume is to state some conclusions to 

 which I have been brought by my experi- 

 ences of twenty years as a horse breeder. 



The first thing which the horse breeder 

 has to learn is that only a few horses out 

 of the many which are bred are of any value 

 to improve the breed. At first, it is almost 

 impossible for liim to realize that this is 

 a law of nature. To the young breeder, it 

 appears that all the sons and daughters of 

 a great sire or of a great dam ought to 

 have the power of building up the breed. 

 He has to learn that the magic force for 

 improvement resides in the very few. The 

 trotting horse breed has had over fifty 

 thousand registered stallions used in the 

 stud and a far larger number of registered 

 brood-mares. Only a feW score of this vast 



